Read-only optical disc medium and method of fabricating the same

(19)

(11)

EP 1 953 744 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	29.04.2009 Bulletin 2009/18

(43)	Date of publication A2:
	06.08.2008 Bulletin 2008/32

(21)	Application number: 08001737.9

(22)	Date of filing: 30.01.2008

(51)

International Patent Classification (IPC):

G11B 7/007^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA MK RS

(30)

Priority:

01.02.2007 JP 2007022865

(71)	Applicant: Sony Disc & Digital Solutions Inc.
	Shinagawa-ku Tokyo (JP)

(72)	Inventor:
	Asahina, Takayuki Tokyo (JP)

(74)	Representative: Müller - Hoffmann & Partner
	Patentanwälte Innere Wiener Strasse 17 81667 München 81667 München (DE)

(54)	Read-only optical disc medium and method of fabricating the same

(57) A read-only optical disc medium is disclosed. The disc medium includes: an information recording area (1) in which information is recorded by means of an embossed pit array formed in a convexo-concave shape having a reflective layer deposited thereon; a test writing area (95) which is used for test write recording of a mark formed by dissipating or decreasing the reflective layer; and an additional write area (94) in which a record data string is formed of a mark by dissipating or decreasing the reflective layer under a recording condition decided in accordance with a result of test write recording performed in the test writing area.

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